Peters photo-lithographer



@time tant' eztznt @tte To ALL WHoM IT MAY eoNoERN:

L. n. PFLEEeoR, oF MILTON, PENNSYLVANIA.

Letters .Patent No. 78,996, dated June 16, 1868.

IMPROVED SAFETY-HOOK.

Be it known that I, L. H. PFLEEGOR, of Milton; in the eonntyoilNorthumberland, and State of Ilennsyl- Vania, have invented an ImprovedSafety-Hook; and I do hereby declare that the following is afull andexact description thereof,reference being had to the accompanyingdrawings, making part of. thisspecification- Figure 1 being alongitudinal section of the stock of the instrument, showing the hookand look-lever in elevation.

Figure 2,11, top View of the instrument.

Figure 3, aside view of the instrument, (on a smaller scale,) showingthe hook in` positions, both as closed and'open.

Figure 4, a view, (on a. reduced scale,) showing a method of attachingtheinstrument to the horse or team for drawing. g i

Like letters designate corresponding parts in all of the gnres.

This invention is applicable to all purposes of drawing where it isdesirable to suddenly release the animal while drawing, even withoutslacking the draught. It is more partieularly'intended for attachinghorses or mulesto the tow-'ropes of'` canal-boats, to street-cars, &c.

The instrument is made ofnvrought iron, steel, or, for some uses, ofmalleable iron. It has a stock, A, provided with ears or bearings, ZZ,in which the hook B is pivoted on a pin,f, and between which, near theother end of the stock', a. look-lever, C, is,v pivoted, atg. The stockhas, also, projections,`a a, between which the point dof the hookenters, (as shown in iig. 1,) when the hook is closed, thereby retainingthe drauglit-ring,

eye, or loop, .into which the hook engages, without the possibility ofescape till the hook is unlocked..

The hook B has a long shank, b, andlocksiinderthe point 7i of-thclock-lever C, whose long arm. cextends further forward, and bearsagainst the. stock, to prevent the hook from unlocking- 4 Thus, not onlyhas the draught on the'hook very litt-le tendency to raise the shank outof place, but, when the lock-lever is in position, as shown in iig. 1,the hook cannot be' Linloeked. When7 however, it is desired to unlockthe hook, the locklever C is raised tothe position indieated by redlines in lig. 8. The shank b of the hook is set'free by being broughtopposite to a portion, z', of the lever nearer to its centre, g, andthen the'draught on the hook throwsv it open into the-position`indicated by red lines in the same figure.r This unlocking is readily'effected, even while the draught is infull force, on account of thegreat-leverage exertedfon the long arm of the lock-lever C, and thesmall leverage on the hook to oppose the unlocking.4

What I claim as my invention, and desire to secure by Letters Patent, isl The combined construction and arrangement of the stock A, hook B, andlock-lever C, snbstantiallyas an for the purpose herein specified.

The above specification'of my improved safetyhook signed by me, this15th day ofApril,-1868. L. H. PFLEEeoR.

Witnesses:

J. S. BROWN, WMJF. BnowNE.

